25In the same way He took the cup also after supper, saying, This cup is the new covenant in My blood; do this, as often as you drink it, in remembrance of Me. 26For as often as you eat this bread and drink the cup, you proclaim the Lords death until He comes. 1 Corinthians 11:25-26 NASB
Precisely.
Surely you know this "Memorial Acclamation" is made in every Catholic Liturgy?
You heard it --- if your hearing is intact --- at those two Catholic funeral Masses you attended.
What did He tell Nicodemus? We come to Him through believing in Him.
You might want to do a word search on the word believe in John. It might surprise you that is the message on how one comes to salvation in Christ....through belief in Him.